If EB=15 centimeters,find the length of CD

Mathematics

1 answer:

Lorico [155]3 years ago

5 0

May i get a picture of the problem because i don’t know the shape of the polygon your trying to find the length of

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I need help with this please

AnnZ [28]

Hi there! The answer is C.

The area of the square in the middle is the following:
$length \: \times \: width \: = 5 \times 5 = 25$
Hence, the area of the square is 25 cm^2.

The area of one triangle is the following:
$0.5 \times base \: \times \: height \: = 0.5 \times 5 \times 8 = 20$
Hence, the total area of the four triangles is 4 × 20 = 80 cm^2.

Therefore, the total area of the pyramid is 80 + 25 = 105 cm^2. The answer is C.

6 0

3 years ago

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What is the mean of the high temperatures, in degrees Fahrenheit, for the week? Show your work.

DiKsa [7]

The mean is the average, so add all the numbers and divide by 7 (7 terms).

-14 is the sum, divided by 7 = -2

The mean is -2.

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4 years ago

Solve. (x + 3)^1/2– 1 = x

Natali [406]

Answer:

x=1

Step-by-step explanation:

$(x + 3) ^{ \frac{1}{2} } - 1 = x \\ \sqrt{x + 3} - 1 = x \\ \sqrt{x + 3} = x + 1 \\ square \: both \: sides \\ x + 3 = {x}^{2} + 2x + 1 \\ {x}^{2} + 2x - x + 1 - 3 = 0 \\ {x}^{2} + x - 2 = 0 \\ x ^{2} + 2x - x - 2 = 0 \\ (x^{2} + 2x) - (x + 2) = 0 \\ x(x + 2) - 1( x + 2) = 0 \\ (x - 1)(x + 2) = 0 \\ x - 1 = 0 \\ x = 1 \\ \\ \\ x + 2 = 0 \\ x = - 2$

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3 years ago

Can anyone help me if i dont get my grade up i wont get to go to my vollyball games

Alexxandr [17]

Answer:

x = 30

Step-by-step explanation:

$\frac{3}{5}$ (30) + $\frac{1}{3}$ (30) = 28

$\frac{3}{5}$ (30) = 18

$\frac{1}{3}$ (30) = 10

18 + 10 = 28

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3 years ago

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Which expression shows how to multiply 5x381 by using place value and exxpanded form?

Dovator [93]

<span><span>1. </span>We have the given number = 5 x 381
Let’s show how to multiply this given equation using its expanded form and place value
=> 5 x 381
since we’re multiplying, we will start with the ones value which is 1
=> 5 x 1 = 5
Second is on the tens value
=> 5 x 80 = 400
Third is the hundreds value
=> 5 x 300 = 1 500
Now, we already have the answer to each values. Add
=> 1 500 + 400 + 5
=> 1 905</span>

5 0

3 years ago